To provide a photoalignable material that can yield a photoalignable film having a high optical uniformity and no alignment defect, and allows photoalignment with exposure in a short period of time. The method comprises stiffening a flexible substrate to provide a first flexibility of the flexible substrate, forming a mounting element on a first side of the flexible substrate, and mounting a first die on the first side of the flexible substrate to couple the first die to the mounting element. The pre-calculated mappings are adjusted according to one or more transmission parameters of the data-carrying signals. The first suction induction port is for receiving a first dry component. According to the cyclone dust collecting apparatus of the present invention, a deterioration of suction force of the cyclone dust collecting apparatus is prevented, and thus a dust collection efficiency of the cyclone dust collecting apparatus will be improved.